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  1. #1
    Senior Member yegg's Avatar
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    Spark, Fuel, or other?

    So I got the bike back together today to the point where it should start. Yeah, "should" start. You guessed it; no go.

    Here is what I know:

    The bike cranks steadily but no "catching" sound.
    The fuel pump runs.
    The plugs have spark (is it good enough?).
    The lithium battery is low on charge and it is effing cold in my garage. It is charging overnight.
    I double checked all of my connections on the induction module and to the plugs (I'm using coil on plug.)

    Is there a way to test to see that fuel is actually making it to the fuel injectors? I have a cold but I swear I thought I smelled fuel.

    Is there something else I should be looking at?

    Thanks.
    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

  2. #2
    Member s22s's Avatar
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    Outside my pay grade Yegg. Let us know when you figure it out though! Maybe someone else can help...good luck.

    #ridesomemore

  3. #3
    Senior Member yegg's Avatar
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    Update:

    Starter fluid directly into the induction module did not start the bike.

    To me this sounds like a lack of spark. But I was able to get spark when out of the cylinder head and grounded to the motor.


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    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

  4. #4
    Senior Member yegg's Avatar
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    Update:

    I replaced the crankshaft position sensor. That did not help.

    I replaced the coil on plug with the original coil and plug wires. They were removed for aesthetics, not performance. That did not help.

    After the above two changes I also tried using starter fluid again. Nothing.

    According to my FP3 there are no fault codes.

    The bike cranks well but does not catch.

    I honestly have no idea what to check next. Any ideas?

    Thanks.
    Last edited by yegg; 02-21-2021 at 07:20 PM.
    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

  5. #5
    Senior Member yegg's Avatar
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    Morning update.

    Just for fun I tried firing her up again this morning. I turned the bike on, heard the pump run, and then hit the start button while holding the throttle open as well. I did not let up on the starter button.

    It cranked well, then there were two loud backfires and a mini ball of flame shot out of the tailpipe connected to the front cylinder. Another noise I heard, and this is the only way I can describe it, is a very loud hollow bubble pop noise.

    Any ideas?

    Thanks
    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

  6. #6
    Senior Member yegg's Avatar
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    Afternoon Update:

    I purchased a cheap Harbor Freight inline spark plug tester and verified that I do have spark.

    The neutral switch was one suggestion that I received. I can crank the bike in neutral. If I shift out of neutral the bike will NOT crank unless the clutch handle is pulled in. To me that indicates a properly functioning neutral switch.

    Someone has got to have an idea.

    Thanks.
    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

  7. #7
    Administrator hulkss's Avatar
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    Just to make sure everything is together right, do a cranking compression check.

    I do it this way:

    Spark plugs out
    Trans in neutral
    Compression gauge connected to a spark plug hole
    Stick a screwdriver handle in the throttle to hold it part way open
    Leave everything switched off
    Use a manual push button starting switch to crank the bike (no fuel or spark this way)
    Crank a few seconds 'till the gauge peaks
    Should be around 200 psi
    Then do the other cylinder

    It's good info to have for reference even if it does not help your problem.

    A compression tester gauge has a check valve to hold the peak pressure it gets.
    2019 FLHCS

  8. #8
    Senior Member yegg's Avatar
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    Thanks Hulkss.

    What is a manual push button starting switch? I think I have the concept, but what do you use and where are you connecting it?

    I went ahead and pulled the induction module before dinner and my plan is to clean the injectors too. I got lucky as a friend worked on his bike recently and I found an old injector connector in my garage. Iím going to use that and a 9 volt battery to cycle it while running a cleaner through it.

    When I pulled the induction module I noticed a black oily residue in it. I wiped it clean but Iím wondering about that now.

    Do you have a recommendation for a decent compression tester?

    Thanks.


    Sent from my iPhone using Tapatalk
    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

  9. #9
    Administrator hulkss's Avatar
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    Quote Originally Posted by yegg View Post
    Thanks Hulkss.

    What is a manual push button starting switch? I think I have the concept, but what do you use and where are you connecting it?

    I went ahead and pulled the induction module before dinner and my plan is to clean the injectors too. I got lucky as a friend worked on his bike recently and I found an old injector connector in my garage. Iím going to use that and a 9 volt battery to cycle it while running a cleaner through it.

    When I pulled the induction module I noticed a black oily residue in it. I wiped it clean but Iím wondering about that now.

    Do you have a recommendation for a decent compression tester?

    Thanks.


    Sent from my iPhone using Tapatalk
    Remote Starter Switch

    It goes between the battery positive post (can be the starter big positive post) and the little post on the starter that powers the solenoid.

    Compression Tester
    2019 FLHCS

  10. #10
    Senior Member yegg's Avatar
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    Thanks again. I owe you a dinner if you ever get out my way.

    I ordered both items and they should be here by the end of the week if UPS ever decides they can make kit up my mountain again.


    Sent from my iPhone using Tapatalk
    Ride Safe,

    Elliott
    2015 FLHXS - Amber Whiskey

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